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Show ‘Without Oxygen There’ s No Fire; Water, Wood or You \ There Andy sends a complete, 15-volume set of Compton’s Pictured Encyclopedia to Richard Bottger, age 10, of Newbury, Ohio, for his question: “What - is oxygen? - When we think of oxygen we ful element does gen one on oxygen, wash with it, we eat it, we drink= is oe free of the air oxygen gas. of oxygen. And 89 per cent of the weight of all the water in the world is oxygen. Even our bodies are 60 per cent oxygen. Oxygen is the most plentiful ~j;element in. the world around us. learn that oxygen liquid comes and solid -|form. Is this a matter of temperature? For and oxygen a to build— and to keep our going. eat it, drink But it, walk we} on it Ls and wash with it. There is oxygen in the stones and bricks of em : |solid rocks. About 49 per cent of the earth’s crust is composed We to breathe also -|But compounds of oxygen form in gaseous, use other elements body processes Ze one-fifth us ul And there is oxygen in the fats, proteins and carbohydrates in our diets. True, we need oxy- -_|that the wonder- around in their wood. There is oxygen— ‘in the a oetaoaed and salads’ | we eat.’ of our lives. But this is not all About oxygen Plants with | think of the life-giving gas -|which we breathe ear minute for us. We is amethyst. our house and there in the woodwork. is oxygen 7 OXYGEN WAS discovered because of its role in the burning process. This process was a mystery until about 185 years ago. Then ered in 1773, that a two men discovcertain element played the star role in the burning process. One was a Swede named Scheele,- the other was an Englishman named Priestly. _ The newly fotnd gas |. was| in named water exists jvapor, liquid and solid ice, depending upon its temperature. | THIS, HOWEVER, does not always apply to the solid, liquid jiand gaseous states of oxygen. {| Oxygen forms liquid water by by Lavoisier, a French-} man. It seems proper that oxygen, such a universal element, should have an international introduction to science, AT ORDINARY tempera:| tures, pure oxygen is a gas. The free oxygen floats off It world’s in the air. At the chilly temforms solid quartz by combinperature of minus 183 degrees combining with hydrogen. ing with the element silica. The. centigrade pure oxygen becomes oxygen in the air is free, it is a : | mixed with other gases Oe Hi | combined with * Men. oe ‘tur ‘Sand is. made “mostly from ‘quartz, ‘a compound of oxygen and silica. Hematite, one of the jron ores, is a compound of iron oxygen are made fiand oxygen. There is oxygen in laboratory. tale stone and talcum powder which rrr Aaa is made er we from talc stone. ek rrr earn ear a at tO ee eo, ee Sh ad dls ictenthi hl Sidi a THE te Piwat ; atom is about {the busiest feHow in the world. It elindh OXYGEN in a is always eager to go into partnership with other elements. 23 |'This is how it forms ‘so many 4 Chewing delicious a Wrigley’s Spearmint different %4 substances — sub- (stances as different from each jother as water, sand and wood. In addition, busy oxygen re- | iHelps oH acts with other elements in the burning 3 process—both the fire in the grate and the slow-burn- jing called oxidation which. goes 4 | on in our bodies. 4. ANSWERS. Offside (football). 3. Pullet. Tee eee Cae yO e CORO ee eer REST SEO eS 0.0, 8°6.%-2.6 @.0'@°0 eee, 4. Bovine. : Or ee ae ne ee ee 2. lime ed 5 or|— |
